Compilare: main.cpp: In function 'int dfs(int, int)': main.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i=0;i<v[nod].size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int, int)': main.cpp:53:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for(int i=0;i<v[nod].size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int dfs(int, int)': main.cpp:32:1: warning: control reaches end of non-void function [-Wreturn-type] 32 | } | ^ main.cpp:15:5: warning: infinite recursion detected [-Winfinite-recursion] 15 | int dfs(int nod,int first) | ^~~ main.cpp:20:22: note: recursive call 20 | int cand0=dfs(v[nod][0].first,0)+v[nod][0].second; | ~~~^~~~~~~~~~~~~~~~~~~ main.cpp:29:23: note: recursive call 29 | return dfs(u.first,0)+u.second; | ~~~^~~~~~~~~~~